Study on a comprehensive evaluation technique for water saving effect of sanitary apparatuses for residential use

对节水型家用电器节水效果的研究主要集中在节水型家用电器减少供水量的效果上；因此，仅对卫生设备和供水设备进行了评价。本研究旨在探讨一种卫生器具的综合评价方法，扩大节水的范围，在热水供应设备将水转化为热水的情况下，包括节约热水和节能效果，并以卫生器具沿途的排水设备为评价指标，降低使用后的排放性能和管道内承载性能。在供水设备方面，从供水特性和用户舒适度方面对节水型设备进行了评价，并对节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水节水在热水供应设备中，对缺乏数据的恒温混合阀、淋浴喷头等的节水和热水节约效果进行了评价。在排水设备中，评价中增加了对厨房垃圾碎料通过处置器排水的携带性能降低、节水型或超节水型抽水马桶的垃圾和厕纸排放性能降低、管道内携带性能降低。从而从供水、热水供应和排水的广义角度，获得了综合评价节水效果的基础知识。

Studies on water saving effect of water-saving type apparatuses for residential use had focused on effect of reduction in their consumption of supplied water ; therefore, only sanitary apparatuses and water supply equipments had been evaluated. This study aims to examine a comprehensive evaluation method for sanitary apparatuses by expanding the scope of water saving and including hot water saving and energy saving effect in the case of transforming water into hot water at hot water supply equipments, as well as lowering of discharge performance and carrying performance within piping after use with the sanitary apparatuses along the way to the drainage equipments as an evaluation index.In the water supply equipments, an evaluation for water-saving type apparatuses regarding water supply characteristics and the user's comfort was conducted, and effects of reduction in water consumption, CO_2 emission, and energy consumption were overall evaluated. In the hot water supply equipments, effects of water saving and hot water saving with thermostatic mixing valves, shower heads, or the like, data of which is lacking, were evaluated. In the drainage equipments, lowering of carrying performance of shredded kitchen garbage in drainage through a disposer, waste and toilet paper discharge performance of water-saving type or super water-saving type water closets, as well as carrying performance within the piping was added in the evaluation.Accordingly, the fundamental knowledge for comprehensively evaluating the water saving effect was obtained from the broad point of view regarding water supply, hot water supply and drainage water.